I was wondering very much the same sort of thing earlier today, though I grant I was musing more on cellphones and other weaker QRM. A friend who was involved in automotive microcode for a US carmake
Not at all. I have seen your posts over two or three years now, and have formed a good opinion of you. Besides <tongue-in-cheek>, you're Canadian and from Ontario, and hence capable only of truth </t
And for tweaking antennas for best match; I use it to determine best whip length on my Anttron HamWhips. But that's one of the things it was designed to do, and so may not belong in this thread. -- M
I can't speak for Larry, but have worked with very large water-cooled mainframe computers. They needed some care and feeding to prevent algae growth, and I don't doubt that IBM put a lot of time and
CORRECTION!!! The max temps on the tube seals are given as 250°C, which is 482°F. There may be a Dow Corning silicone oil that is good to 482°F, but I'll have to do research to find it. OTOH, if you
I see that QTD is unassigned. I propose QTD Will you activate fire-suppression systems on your equipment (specify equipment if required)? I have activated fire-suppression systems on my equipment (sp
And to me. I'm glad my dad is dead; he was a mechanical design engineer who couldn't bear either stupidity or bad design, and this exemplifies both. Me? I keep thinking about the belts slipping, and
<http://mikea.ath.cx/check-the-oil.html> and sounds like something without which I could do very nicely, though the hardware used to check the oil could make a very nice toy. Other stories are to be
Oh, yes indeed. I got something almost exactly like this reply recently, when I asked about something that used to be carried at my local grocery store: "There's no demand for this, so we don't stock
First guess is switching power supply, though touch-controlled lamps, aquarium heaters, lamp dimmers, and fan motor controls also come prominently to mind. Can you shut down the house entirely at the
So is silver, for that matter, and a lot of plating shops are set up to first silver-plate, then gold-plate over it. Advantages: gold on the outside, where it shields the silver from oxidation and is
About RF amplifiers for the amateur radio service, certainly. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin _______________________________________________ Amps mailing list Amps@conte
This is obviously some serious RF-amp stuff in the NASA ground station at Tananarive, Madagascar; the pic was taken sometime in 1965-67. I used to get tracking tapes from this station, when I was at
Sounds like something has gone seriously wrong with the neutralization, OM, and it's going into oscillation when keyed. The high SWR tells us that it's not oscillating in the 6m band, either. It may
Erm ... 300/2500 is 12%, leaving 88% going to the tube. The same loss on a 13.8V supply is 1.65V, leaving 12.14V. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin ________________________
Lower cost and "good enough". Better than "good enough" costs more. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin _______________________________________________ Amps mailing list Amps
Depends on how much IR the glass transmits. If it's perfectly transparent to IR, then the air gets hot from the IR, but the envelope doesn't. If it's perfectly opaque to IR, then the envelope gets ho
Not exactly. To convert an expression from parenthesized algebraic notation to RPN, you have to handle the parentheses (nested or not) yourself. In RPN, there aren't any parentheses. My degree's in m
I didn't know you were in my area! The local club found that the 2m repeater RX front end was detuned, the LMR-400 from the RX to the antenna was ... _seriously_ _degraded_[1] by weather and had to b
Add that they're not good in linear service (think Class-C), as I understand it. They _are_ most interesting in appearance. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin ______________